Ball-grinding machines



J. J. MCINTYRE.

BALL GRINDING MACHINE.

APPLICATION FILED SEPT.24, 191s.

Patented Mar. 2:3, 1920,

' tion of a ball finishing machine provided. with the features of this invention.

rarraurr orrro natt ornnnme IMAGINE).

- To all whom it may concern.-

' lication.

This invention relates to-the means employed tor pressing one toward the other ot the cooperative platesor disks of machines devised for grinding or lapping or finishing metallic ballet in a common type Oil such machines the balls to be ground, lapped or finished are fed between two plates or disks, one of which has a rotatory movement for rolling the balls between the plates and the other a reciprocatory movement for applyingthe required pressure to the balls being rolled between. the plates Spring and weights have been found unreliable for imparting the required pressure to the reciprocatory plate. (iii and. similar liquids under pres sure have been found unsatisdactory due to leakage and waste resulting from the impossibility of keeping the joints between the moving" parts tight owing; to the vibrations incident to the "rolling process. Compressed air alone is of little practical value as the moisture contained therein'. rust's the surfaces and. causes the moving parts to bind and become inoperative.

The object oi the present invention is to provide a pneumatic system. for producing;

the required pressure on the balls between the I rolling plates,

which. is supplied with means whereby a vapor or spray of oil is injected 8th the air into the cylinder back of the piston so as to keep thcparts in good oper. ative condition without the waste and the other disadvantages oi leaking oil or the necessity of: providing arpurnped lubricat inn" circulatiol'i.

The figure of the accompanying drawings shows a side elevation with parts out in secwhich is in the machine illustrated the rotatory dislr l. with grinding or lapping; face 2 of sual form and material is fired upon the shaft Sthat is provided with a driving pulley i and is mounted in hearings in the top of the standard The non-rotatorv dislr 6 with operating lace 7 oil usual term and material is secured After the rolling v specification of Letters Patent. Pa'temt gfl ll [awry 2,, jtQQytl, a otation tier September iota tonal N0. $25,954:,

tothe end of a piston 8 that is tree to rein the cylindrical casing 9 at the disk which is ciprocate top of the standard 10. This free to reciprocate with the piston may be held from rotation by the engagement oi. a stud 11 that projects from the back otthe disk into engagement with a bracket '12. The piston shown has a cylindrical chamber 13 and extending into this chamber is a circular hub 14 that projects from the cap 15 which is bolted to the end of the casing. Paul-ting rings 16 are placed in grooves in the hub to keep, the joint between the inner wall of the piston and the outer wall of the hub tight. in the hub is a chamber 17 and projecting into the cylinder chamber from the hub chamber is an injector nozzle 18. Entering the outer end of the hub and communicating with the chamber therein is a pipe 19 provided with a stop valve 520 of common form. This pipe is designed to be connected with any convenient source of air under pressur Communicating with the pipe 19 between. the valve and the hub is a pipe 21 which is provided with a stop valve 22 and at its upper end has an open receptacle 23.

in using this apparatus a desired quantity of oil is poured into the receptacle, the air inlet valve. is closed and the exhaust valve 22 is opened. Under these conditions the oil will flow from the receptacle down through the piping to the chamber in the hub. The exhaust valve 22 is then closed and the air inlet valve 20 is opened to ad init the necessary amount of: compressed air to force the reciprocatory piston and nonrotatinp disk forward and. give the required pressure on the balls between the plates. A51

the compressed air passes through the hub over the oil in the hub chamber it picks up a small quantity of oil anddisperses it from the injecting nozzle in the form of a vapor or line spray which-covers the interior of the piston chamber with a film of oil that will keep the parts in good working condition. oi the balls is completed the air inlet valveis closed andthe exhaust valve is opened allowing air from the piston chamber to escape through the oil receptacle and thus relieve the pressure on the piston and balls between the rolling disks. But little lubricant is used and as often as that which is let into the chamber in the hub becomes exhausted by being sprayed into the piston and carried out by the eahaust tory disk, a reciprocatory disk, at chambered of the air, the suppl in the hub chamber may be renewed, as a ove described, by filling the oil receptacle and allowing the oil to flow down through the exhaust opening.

The invention claimed is 1. A ball grinding machine having a rotatory disk, at reciprocatory disk, a piston attached to the reciprocatory disk, means for admitting air under pressure to the back of the piston, and means for injecting oil with the air back of the piston.

2. A ball grinding machine having a rotator Y disk, a reciprocatory disk, a chainbere piston attached to the reciprocatory disk, acasing inclosing the piston, said casing having an air and oil inlet opening through it to the chamber in the piston, and means for admitting oil and air to said opening in the casing and the chamber in the piston.

3. A ball grinding machine having a rotapiston attached to the reciprocatory disk, an inclosing case having a chambered hnb extending intoithe piston, said chamber in the hub communicating with the chamber in the piston, means [for admitting oil to the chamber in said hub, and means for admitting air under pressure to said chamber.

4. A ball grinding machine having a re tatory disk, a reciprocatol'y disk, :1 chain bered piston attached to the reciprocatory disk, a duct for admitting air under pressure to the chamber in the piston, and

means for admitting oil to and allowing cating with the chamber in the hub, an oil inlet and air exhaust pipe connnnnicating with the air inlet pipe, and stop valves for opening and closing the air and oil pipes.

G. A ball grinding machine having ball rolling disks, a piston for moving one disk toward and from the other disk, a casing inclosing the piston, an oil chamber with means for admitting oil thereto in the casing, and means for admitting air under pressure through said Oll chamber into the casing back or the piston.

JOHN J. MQINTYRE. 

